Factory.kt

/**
 * Factory pattern -> Getting one from multiple options
 */
enum class DialogType {
    DIALOG_CREATE_CHAT,
    DIALOG_DELETE_MESSAGE,
    DIALOG_EDIT_MESSAGE
}

sealed class Dialog {
    object CreateChatDialog : Dialog()
    object DeleteMessageDialog: Dialog()
    object EditMessageDialog: Dialog()
}

object DialogFactory {

    fun createDialog(dialogType: DialogType): Dialog {
        return when(dialogType) {
            DialogType.DIALOG_CREATE_CHAT -> Dialog.CreateChatDialog
            DialogType.DIALOG_DELETE_MESSAGE -> Dialog.DeleteMessageDialog
            DialogType.DIALOG_EDIT_MESSAGE -> Dialog.EditMessageDialog
        }
    }
}